Lewis.



110.884.198.. PATENTE'D APR. 7", 19oa. A

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LEWIS.

APPLIOATIOIT FILED JULY 23. 1907I 1.1.1111 infirm.

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awww? PHILIP NEDDO, 0F BARRE, VERMONT.

LEWIS.

Specification of Letters Patent.

Patented April 7, 1908.

Application led `Tuly 23, 1907. Serial No. 385,145.

To all whom it may concern.'

Be it known that I, PHILIP NEDDo, a citizen of the United States of America, residing at Barre, in the countyof Washington and State of Vermont, have invented new and useful Improvements in Lewises, of which the following is a specification.

My invention relates to lewises for lifting stones, and its primary object is to provide a device of this character which is simple of construction, effective in operation, and which may be manufactured and sold at a com arativel low cost.

1th the a o ve and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter fully described, claimed and illus- .trated in the accompanying drawing, Where- 1n:-

Figure 1 is a view in side elevation of a lewis constructed in accordance with my invention, the relative position of the parts being that which they are caused to assume before the lewis isplaced in enga ement with the stone. Fig. 2 is a view simi ar to Fig. 1, the relative position of the parts being that which they assume when the lewis is sustaining the weight of the stone. Fig. 3 is a view in side elevation, and Fig. 4 is atop plan view.

Referring to the drawings b reference numerals, 2 designates a head w ich is rovided with op ositely projecting pairs o integrally forme arms 3, the arms of each pair belng com aratively spaced. The head 2 is also rovi ed with a rectangular opening 4. A su stantially wedge-shaped s reader 5 is provided with a rectangular shan 6 adapted to be received by the openin 4, whereby the spreader is slidably mounte upon the head 2. vThe s reader is prevented from becoming Aacoidenta ly disengaged from the head 2 by means of a stop 7 which is secured to the shank 6 after the spreader has been applied to the head. Y A ring 8 is mounted upon the upper end of the spreader and is adapted to have the chain of a hoisting machine secured thereto.

A jaw 9 is pivotally and slidably mounted upon and between each pair of arms 3 through the mediumof an offset head 10. The heads 10 are provided with reduced shank ortions 11 which are received between t e pairs of arms 3. The formations of the shank portions 11 provide upper anllar shoulders 12 and 13 and lower shoulers 14. The apicesof the shoulders 12 and 13 provide fulcrum points upon which the jaws 9 are supported upon the arms 3. The inner faces 15 of the jaws 9 are formed to conform to the contour of the proximate edges of the spreader 5, while the outer or acting faces 16 thereof are inclined downwardly and laterally in opposite directions. The jaws 9 areprevented from becoming accidentally displaced by means of bolts 17 which extendv across the spaces between the pairs of arms 3.

- In practlce, the stone to be lifted is provided with a socket having undercut end walls. The parts of the lewls are assembled in the relative positions disclosed in Fi .1 of the drawing, after which the lower end t ereof is placed within thesocket of the stone. An initial lifting power applied to the spreader 5 imparts thereto a sliding movement with relation to the jaws 9 during which sliding movement the spreader expands the jaws, forcing their acting faces into en agement with the end walls of the socket; hen the acting faces of the jaws have been thus brought into engagement with the end walls of the socket, the lewis is securel fastened to the stone and the spreader ma e rigid with relation to the jaws, whereu on a further u ward movement applied to t e spreader W1ll lift the stone. The spreading of the aws causes the extremities of the shoulders 13 and 14 to bind against the upper and lower surfaces of the arms 3, whereby to prevent the jaws from having any lateral movement upon the arms, the lateral adjustment of the aws upon the arms 3 being provided for the purpose of adapting the lewis for application to sockets of varying lengths.

Having fully described and illustrated my invention, what I claim is:

1. A lewis comprising a head provided with an opening and with o positely projecting pairs of relatively spaced arms, a jaw provided with a head having a shank portion adapted to be received between each pair of arms, said head being provided with shoulders forming fulcrum points adapted to rest upon the arms, and 'a spreader provided with a shank portion adapted to project through the opening in the head.

2. A lewis comprising a head provided with an openin and with oppositely projecting pairs of re atively spaced arms, a jaw mounted upon and between each pair of arms, and a spreader provided with a shank portion adapted to project through the openmg in the head.

3. A lewis comprising a head provided l Vided with a shank 1portion projecting 10 with an opening and with oppositely proj eetthrough the opening in t e head. ing arms, jaws mounted upon the arms and a In testimony whereof I aflix my signature spreader provided with a shank ortion proin presence of two Witnesses.

- jeetinfr through the opening in t e head.

4. lewis comprising a head provided PHILIP NEDDO' with an opening and with op ositely projeot- Witnesses: ing arms, jaws fulorumec and slidably DAVID POMBRIO,

mounted upon the arms and a spreader pro- BURT H. WELLS. 

